13 distinct Greek words appear in this verse.

This verse quotes or alludes to 1 earlier text.

• Exod 8:2 · allusion
  "And if thou refuse to let them go, behold, I will smite all thy borders with frogs:"
  Exodus: plague of frogs — unclean spirits like frogs from the dragon

1 variant unit attested by manuscript witnesses and modern critical editions.

• Angels and Demons
• Idolatry
• Spiritual Warfare

3 passages from patristic writers, Reformers, and church catechisms citing this verse.

• 1John 4:1 — Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.
• 1Kgs 22:22 — And the LORD said unto him, Wherewith? And he said, I will go forth, and I will be a lying spirit in the mouth of all his prophets. And he said, Thou shalt persuade him, and prevail also: go forth, an
• 1Tim 4:1 — Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils;
• 2Pet 2:1 — But there were false prophets also among the people, even as there shall be false teachers among you, who privily shall bring in damnable heresies, even denying the Lord that bought them, and bring up
• 2Thess 2:9 — Even him, whose coming is after the working of Satan with all power and signs and lying wonders,
• 2Tim 3:1 — This know also, that in the last days perilous times shall come.
• Exod 8:2 — And if thou refuse to let them go, behold, I will smite all thy borders with frogs:
• Isa 27:1 — In that day the LORD with his sore and great and strong sword shall punish leviathan the piercing serpent, even leviathan that crooked serpent; and he shall slay the dragon that is in the sea.
• Job 26:4 — To whom hast thou uttered words? and whose spirit came from thee?
• Matt 7:15 — Beware of false prophets, which come to you in sheep’s clothing, but inwardly they are ravening wolves.
• Mic 2:11 — If a man walking in the spirit and falsehood do lie, saying, I will prophesy unto thee of wine and of strong drink; he shall even be the prophet of this people.
• Ps 78:45 — He sent divers sorts of flies among them, which devoured them; and frogs, which destroyed them.
• Ps 105:30 — Their land brought forth frogs in abundance, in the chambers of their kings.
• Ps 105:30 — Their land brought forth frogs in abundance, in the chambers of their kings.
• Rev 12:3 — And there appeared another wonder in heaven; and behold a great red dragon, having seven heads and ten horns, and seven crowns upon his heads.
• Rev 12:3 — And there appeared another wonder in heaven; and behold a great red dragon, having seven heads and ten horns, and seven crowns upon his heads.
• Rev 12:9 — And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him.
• Rev 13:1 — And I stood upon the sand of the sea, and saw a beast rise up out of the sea, having seven heads and ten horns, and upon his horns ten crowns, and upon his heads the name of blasphemy.
• Rev 13:11 — And I beheld another beast coming up out of the earth; and he had two horns like a lamb, and he spake as a dragon.
• Rev 13:11 — And I beheld another beast coming up out of the earth; and he had two horns like a lamb, and he spake as a dragon.
• Rev 16:14 — For they are the spirits of devils, working miracles, which go forth unto the kings of the earth and of the whole world, to gather them to the battle of that great day of God Almighty.
• Rev 18:2 — And he cried mightily with a strong voice, saying, Babylon the great is fallen, is fallen, and is become the habitation of devils, and the hold of every foul spirit, and a cage of every unclean and ha
• Rev 19:20 — And the beast was taken, and with him the false prophet that wrought miracles before him, with which he deceived them that had received the mark of the beast, and them that worshipped his image. These
• Rev 19:20 — And the beast was taken, and with him the false prophet that wrought miracles before him, with which he deceived them that had received the mark of the beast, and them that worshipped his image. These
• Rev 20:10 — And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever.
• Rev 20:10 — And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever.
• Zech 13:2 — And it shall come to pass in that day, saith the LORD of hosts, that I will cut off the names of the idols out of the land, and they shall no more be remembered: and also I will cause the prophets and